ftplib.cpp-yiteyi-C++库

/***************************************************************************
ftplib.cpp – description
——————-
begin : lin lu 27 2005
copyright : (C) 2003 by mkulke
email : thinking_nlp@163.com
***************************************************************************/
#include “ftplib.h”
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <string>
using namespace std;
/* io function names */
#define net_read read
#define net_write write
#define net_close close
/* socket values */
#define SETSOCKOPT_OPTVAL_TYPE (void *)
#define FTPLIB_BUFSIZ 1024
#define ACCEPT_TIMEOUT 30
/* io types */
#define FTPLIB_CONTROL 0
#define FTPLIB_READ 1
#define FTPLIB_WRITE 2
/*
* Constructor
*/
ftplib::ftplib()
{
SSL_library_init();
mp_netbuf = static_cast<netbuf *>(calloc(1,sizeof(netbuf)));
if (mp_netbuf == NULL) perror(“calloc”);
mp_netbuf->buf = static_cast<char *>(malloc(FTPLIB_BUFSIZ));
if (mp_netbuf->buf == NULL)
{
perror(“calloc”);
free(mp_netbuf);
}
mp_netbuf->ctx = SSL_CTX_new(SSLv23_method());
SSL_CTX_set_verify(mp_netbuf->ctx, SSL_VERIFY_NONE, NULL);
mp_netbuf->ssl = SSL_new(mp_netbuf->ctx);
ClearNetbuf();
}
/*
* Destructor
*/
ftplib::~ftplib()
{
SSL_free(mp_netbuf->ssl);
SSL_CTX_free(mp_netbuf->ctx);
free(mp_netbuf->buf);
free(mp_netbuf);
}
/*
* socket_wait – wait for socket to receive or flush data
*
* return 1 if no user callback, otherwise, return value returned by
* user callback
*/
int ftplib::socket_wait(netbuf *ctl)
{
fd_set fd,*rfd = NULL,*wfd = NULL;
struct timeval tv;
int rv = 0;
if (ctl->idlecb == NULL) return 1;
/*if ((ctl->dir == FTPLIB_CONTROL)
|| (ctl->idlecb == NULL)
|| ((ctl->idletime.tv_sec == 0)
&& //(ctl->idletime.tv_usec 0))
return 1;*/
if (ctl->dir == FTPLIB_WRITE) wfd = &fd;
else rfd = &fd;
FD_ZERO(&fd);
do
{
FD_SET(ctl->handle,&fd);
tv = ctl->idletime;
rv = select(ctl->handle+1, rfd, wfd, NULL, &tv);
if (rv == -1)
{
rv = 0;
strncpy(ctl->ctrl->response, strerror(errno), sizeof(ctl->ctrl->response));
break;
}
else if (rv > 0)
{
rv = 1;
break;
}
} while ((rv = ctl->idlecb(ctl->cbarg)));
return rv;
}
/*
* read a line of text
*
* return -1 on error or bytecount
*/
int ftplib::readline(char *buf,int max,netbuf *ctl)
{
int x,retval = 0;
char *end,*bp=buf;
int eof = 0;
if ((ctl->dir != FTPLIB_CONTROL) && (ctl->dir != FTPLIB_READ))
return -1;
if (max == 0)
return 0;
do
{
if (ctl->cavail > 0)
{
x = (max >= ctl->cavail) ? ctl->cavail : max-1;
end = static_cast<char*>(memccpy(bp,ctl->cget,‘\n’,x));
if (end != NULL)
x = end – bp;
retval += x;
bp += x;
*bp = ‘\0’;
max -= x;
ctl->cget += x;
ctl->cavail -= x;
if (end != NULL)
{
bp -= 2;
if (strcmp(bp,“\r\n”) == 0)
{
*bp++ = ‘\n’;
*bp++ = ‘\0’;
–retval;
}
break;
}
}
if (max == 1)
{
*buf = ‘\0’;
break;
}
if (ctl->cput == ctl->cget)
{
ctl->cput = ctl->cget = ctl->buf;
ctl->cavail = 0;
ctl->cleft = FTPLIB_BUFSIZ;
}
if (eof)
{
if (retval == 0)
retval = -1;
break;
}
if (!socket_wait(ctl)) return retval;
if (ctl->tlsdata) x = SSL_read(ctl->ssl, ctl->cput, ctl->cleft);
else
{
if (ctl->tlsctrl) x = SSL_read(ctl->ssl, ctl->cput, ctl->cleft);
else x = net_read(ctl->handle,ctl->cput,ctl->cleft);
}
if ( x == -1)
{
perror(“read”);
retval = -1;
break;
}
// LOGGING FUNCTIONALITY!!!
if ((ctl->dir == FTPLIB_CONTROL) && (mp_netbuf->logcb != NULL))
{
*((ctl->cput)+x) = ‘\0’;
mp_netbuf->logcb(ctl->cput, mp_netbuf->cbarg, true);
}
if (x == 0) eof = 1;
ctl->cleft -= x;
ctl->cavail += x;
ctl->cput += x;
} while (1);
return retval;
}
/*
* write lines of text
*
* return -1 on error or bytecount
*/
int ftplib::writeline(char *buf, int len, netbuf *nData)
{
int x, nb=0, w;
char *ubp = buf, *nbp;
char lc=0;
if (nData->dir != FTPLIB_WRITE)
return -1;
nbp = nData->buf;
for (x=0; x < len; x++)
{
if ((*ubp == ‘\n’) && (lc != ‘\r’))
{
if (nb == FTPLIB_BUFSIZ)
{
if (!socket_wait(nData)) return x;
if (nData->tlsctrl) w = SSL_write(nData->ssl, nbp, FTPLIB_BUFSIZ);
else w = net_write(nData->handle, nbp, FTPLIB_BUFSIZ);
if (w != FTPLIB_BUFSIZ)
{
printf(“net_write(1) returned %d, errno = %d\n”, w, errno);
return(-1);
}
nb = 0;
}
nbp[nb++] = ‘\r’;
}
if (nb == FTPLIB_BUFSIZ)
{
if (!socket_wait(nData))
return x;
if (nData->tlsctrl) w = SSL_write(nData->ssl, nbp, FTPLIB_BUFSIZ);
else w = net_write(nData->handle, nbp, FTPLIB_BUFSIZ);
if (w != FTPLIB_BUFSIZ)
{
printf(“net_write(2) returned %d, errno = %d\n”, w, errno);
return(-1);
}
nb = 0;
}
nbp[nb++] = lc = *ubp++;
}
if (nb)
{
if (!socket_wait(nData)) return x;
if (nData->tlsctrl) w = SSL_write(nData->ssl, nbp, nb);
else w = net_write(nData->handle, nbp, nb);
if (w != nb)
{
printf(“net_write(3) returned %d, errno = %d\n”, w, errno);
return(-1);
}
}
return len;
}
/*
* read a response from the server
*
* return 0 if first char doesn’t match
* return 1 if first char matches
*/
int ftplib::readresp(char c, netbuf *nControl)
{
char match[5];
if (readline(nControl->response,256,nControl) == -1)
{
perror(“Control socket read failed”);
return 0;
}
if (nControl->response[3] == ‘-‘)
{
strncpy(match,nControl->response,3);
match[3] = ‘ ‘;
match[4] = ‘\0’;
do
{
if (readline(nControl->response,256,nControl) == -1)
{
perror(“Control socket read failed”);
return 0;
}
} while (strncmp(nControl->response,match,4));
}
if (nControl->response[0] == c) return 1;
return 0;
}
/*
* FtpLastResponse – return a pointer to the last response received
*/
char* ftplib::LastResponse()
{
if ((mp_netbuf) && (mp_netbuf->dir == FTPLIB_CONTROL)) return mp_netbuf->response;
return NULL;
}
/*
* ftplib::Connect – connect to remote server
*
* return 1 if connected, 0 if not
*/
int ftplib::Connect(const char *host)
{
int sControl;
struct sockaddr_in sin;
struct hostent *phe;
struct servent *pse;
int on=1;
int ret;
char *lhost;
char *pnum;
mp_netbuf->dir = FTPLIB_CONTROL;
mp_netbuf->ctrl = NULL;
mp_netbuf->xfered = 0;
mp_netbuf->xfered1 = 0;
mp_netbuf->tlsctrl = 0;
mp_netbuf->tlsdata = 0;
mp_netbuf->offset = 0;
mp_netbuf->handle = 0;
memset(&sin,0,sizeof(sin));
sin.sin_family = AF_INET;
lhost = strdup(host);
pnum = strchr(lhost,‘:’);
if (pnum == NULL)
{
if ((pse = getservbyname(“ftp”,“tcp”)) == NULL)
{
perror(“getservbyname”);
return 0;
}
sin.sin_port = pse->s_port;
}
else
{
*pnum++ = ‘\0’;
if (isdigit(*pnum)) sin.sin_port = htons(atoi(pnum));
else
{
pse = getservbyname(pnum,“tcp”);
sin.sin_port = pse->s_port;
}
}
ret = inet_aton(lhost, &sin.sin_addr);
if (ret == 0)
{
if ((phe = gethostbyname(lhost)) == NULL)
{
perror(“gethostbyname”);
return 0;
}
memcpy((char *)&sin.sin_addr, phe->h_addr, phe->h_length);
}
free(lhost);
sControl = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sControl == -1)
{
perror(“socket”);
return 0;
}
if (setsockopt(sControl,SOL_SOCKET,SO_REUSEADDR, SETSOCKOPT_OPTVAL_TYPE &on, sizeof(on)) == -1)
{
perror(“setsockopt”);
net_close(sControl);
return 0;
}
if (connect(sControl, (struct sockaddr *)&sin, sizeof(sin)) == -1)
{
perror(“connect”);
net_close(sControl);
return 0;
}
mp_netbuf->handle = sControl;
if (readresp(‘2’, mp_netbuf) == 0)
{
net_close(sControl);
mp_netbuf->handle = 0;
return 0;
}
return 1;
}
/*
* FtpSendCmd – send a command and wait for expected response
*
* return 1 if proper response received, 0 otherwise
*/
int ftplib::FtpSendCmd(const char *cmd, char expresp, netbuf *nControl)
{
char buf[256];
int x;
if (!nControl->handle) return 0;
if (nControl->dir != FTPLIB_CONTROL) return 0;
sprintf(buf,“%s\r\n”,cmd);
if (nControl->tlsctrl) x = SSL_write(nControl->ssl,buf,strlen(buf));
else x = net_write(nControl->handle,buf,strlen(buf));
if (x <= 0)
{
perror(“write”);
return 0;
}
if (mp_netbuf->logcb != NULL) mp_netbuf->logcb(buf, mp_netbuf->cbarg, false);
return readresp(expresp, nControl);
}
/*
* FtpLogin – log in to remote server
*
* return 1 if logged in, 0 otherwise
*/
int ftplib::Login(const char *user, const char *pass)
{
char tempbuf[64];
if (((strlen(user) + 7) > sizeof(tempbuf)) || ((strlen(pass) + 7) > sizeof(tempbuf))) return 0;
sprintf(tempbuf, “USER %s”, user);
if (!FtpSendCmd(tempbuf,‘3’,mp_netbuf))
{
if (mp_netbuf->ctrl != NULL) return 1;
if (*LastResponse() == ‘2’) return 1;
return 0;
}
sprintf(tempbuf,“PASS %s”,pass);
return FtpSendCmd(tempbuf,‘2’,mp_netbuf);
}
/*
* FtpAcceptConnection – accept connection from server
*
* return 1 if successful, 0 otherwise
*/
int ftplib::FtpAcceptConnection(netbuf *nData, netbuf *nControl)
{
int sData;
struct sockaddr addr;
unsigned int l;
int i;
struct timeval tv;
fd_set mask;
int rv = 0;
FD_ZERO(&mask);
FD_SET(nControl->handle, &mask);
FD_SET(nData->handle, &mask);
tv.tv_usec = 0;
tv.tv_sec = ACCEPT_TIMEOUT;
i = nControl->handle;
if (i < nData->handle) i = nData->handle;
i = select(i+1, &mask, NULL, NULL, &tv);
if (i == -1)
{
strncpy(nControl->response, strerror(errno), sizeof(nControl->response));
net_close(nData->handle);
nData->handle = 0;
rv = 0;
}
else if (i == 0)
{
strcpy(nControl->response, “timed out waiting for connection”);
net_close(nData->handle);
nData->handle = 0;
rv = 0;
}
else
{
if (FD_ISSET(nData->handle, &mask))
{
l = sizeof(addr);
sData = accept(nData->handle, &addr, &l);
i = errno;
net_close(nData->handle);
if (sData > 0)
{
rv = 1;
nData->handle = sData;
nData->ctrl = nControl;
}
else
{
strncpy(nControl->response, strerror(i), sizeof(nControl->response));
nData->handle = 0;
rv = 0;
}
}
else if (FD_ISSET(nControl->handle, &mask))
{
net_close(nData->handle);
nData->handle = 0;
readresp(‘2’, nControl);
rv = 0;
}
}
return rv;
}
/*
* FtpAccess – return a handle for a data stream
*
* return 1 if successful, 0 otherwise
*/
int ftplib::FtpAccess(const char *path, int typ, int mode, netbuf *nControl, netbuf **nData)
//int ftplib::FtpAccess(const char *path, int typ, int mode)
{
char buf[256];
int dir, ret;
if ((path == NULL) && ((typ == FTPLIB_FILE_WRITE)
|| (typ == FTPLIB_FILE_READ)
|| (typ == FTPLIB_FILE_READ_APPEND)
|| (typ == FTPLIB_FILE_WRITE_APPEND)))
{
sprintf(nControl->response,“Missing path argument for file transfer\n”);
return 0;
}
sprintf(buf, “TYPE %c”, mode);
if (!FtpSendCmd(buf, ‘2’, nControl)) return 0;
switch (typ)
{
case FTPLIB_DIR:
strcpy(buf,“NLST”);
dir = FTPLIB_READ;
break;
case FTPLIB_DIR_VERBOSE:
strcpy(buf,“LIST -aL”);
dir = FTPLIB_READ;
break;
case FTPLIB_FILE_READ_APPEND:
case FTPLIB_FILE_READ:
strcpy(buf,“RETR”);
dir = FTPLIB_READ;
break;
case FTPLIB_FILE_WRITE_APPEND:
case FTPLIB_FILE_WRITE:
strcpy(buf,“STOR”);
dir = FTPLIB_WRITE;
break;
default:
sprintf(nControl->response, “Invalid open type %d\n”, typ);
return 0;
}
if (path != NULL)
{
int i = strlen(buf);
buf[i++] = ‘ ‘;
if ((strlen(path) + i) >= sizeof(buf)) return 0;
strcpy(&buf[i],path);
}
if (nControl->cmode == ftplib::pasv)
{
if (FtpOpenPasv(nControl, nData, mode, dir, buf) == -1) return 0;
}
if (nControl->cmode == ftplib::port)
{
if (FtpOpenPort(nControl, nData, mode, dir, buf) == -1) return 0;
if (!FtpAcceptConnection(*nData,nControl))
{
FtpClose(*nData);
*nData = NULL;
return 0;
}
}
if (nControl->tlsdata)
{
(*nData)->ssl = SSL_new(nControl->ctx);
(*nData)->sbio = BIO_new_socket((*nData)->handle, BIO_NOCLOSE);
SSL_set_bio((*nData)->ssl,(*nData)->sbio,(*nData)->sbio);
ret = SSL_connect((*nData)->ssl);
if (ret != 1) return 0;
(*nData)->tlsdata = 1;
}
return 1;
}
/*
* FtpOpenPort – Establishes a PORT connection for data transfer
*
* return 1 if successful, -1 otherwise
*/
int ftplib::FtpOpenPort(netbuf *nControl, netbuf **nData, int mode, int dir, char *cmd)
{
int sData;
union {
struct sockaddr sa;
struct sockaddr_in in;
} sin;
struct linger lng = { 0, 0 };
unsigned int l;
int on=1;
netbuf *ctrl;
char buf[256];
if (nControl->dir != FTPLIB_CONTROL) return -1;
if ((dir != FTPLIB_READ) && (dir != FTPLIB_WRITE))
{
sprintf(nControl->response, “Invalid direction %d\n”, dir);
return -1;
}
if ((mode != ftplib::ascii) && (mode != ftplib::image))
{
sprintf(nControl->response, “Invalid mode %c\n”, mode);
return -1;
}
l = sizeof(sin);
if (getsockname(nControl->handle, &sin.sa, &l) < 0)
{
perror(“getsockname”);
return -1;
}
sData = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
if (sData == -1)
{
perror(“socket”);
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_REUSEADDR, SETSOCKOPT_OPTVAL_TYPE &on,sizeof(on)) == -1)
{
perror(“setsockopt”);
net_close(sData);
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_LINGER, SETSOCKOPT_OPTVAL_TYPE &lng,sizeof(lng)) == -1)
{
perror(“setsockopt”);
net_close(sData);
return -1;
}
sin.in.sin_port = 0;
if (bind(sData, &sin.sa, sizeof(sin)) == -1)
{
perror(“bind”);
net_close(sData);
return -1;
}
if (listen(sData, 1) < 0)
{
perror(“listen”);
net_close(sData);
return -1;
}
if (getsockname(sData, &sin.sa, &l) < 0) return 0;
sprintf(buf, “PORT %d,%d,%d,%d,%d,%d”,
(unsigned char) sin.sa.sa_data[2],
(unsigned char) sin.sa.sa_data[3],
(unsigned char) sin.sa.sa_data[4],
(unsigned char) sin.sa.sa_data[5],
(unsigned char) sin.sa.sa_data[0],
(unsigned char) sin.sa.sa_data[1]);
if (!FtpSendCmd(buf,‘2’,nControl))
{
net_close(sData);
return -1;
}
if (mp_netbuf->offset != 0)
{
char buf[256];
sprintf(buf,“REST %ld”, mp_netbuf->offset);
if (!FtpSendCmd(buf,‘3’,nControl))
{
net_close(sData);
return 0;
}
}
ctrl = static_cast<netbuf*>(calloc(1,sizeof(netbuf)));
if (ctrl == NULL)
{
perror(“calloc”);
net_close(sData);
return -1;
}
if ((mode == ‘A’) && ((ctrl->buf = static_cast<char*>(malloc(FTPLIB_BUFSIZ))) == NULL))
{
perror(“calloc”);
net_close(sData);
free(ctrl);
return -1;
}
if (!FtpSendCmd(cmd, ‘1’, nControl))
{
FtpClose(*nData);
*nData = NULL;
return -1;
}
ctrl->handle = sData;
ctrl->dir = dir;
ctrl->ctrl = (nControl->cmode == ftplib::pasv) ? nControl : NULL;
ctrl->idletime = nControl->idletime;
ctrl->cbarg = nControl->cbarg;
ctrl->xfered = 0;
ctrl->xfered1 = 0;
ctrl->cbbytes = nControl->cbbytes;
if (ctrl->idletime.tv_sec || ctrl->idletime.tv_usec) ctrl->idlecb = nControl->idlecb;
else ctrl->idlecb = NULL;
if (ctrl->cbbytes ) ctrl->xfercb = nControl->xfercb;
else ctrl->xfercb = NULL;
*nData = ctrl;
return 1;
}
/*
* FtpOpenPasv – Establishes a PASV connection for data transfer
*
* return 1 if successful, -1 otherwise
*/
int ftplib::FtpOpenPasv(netbuf *nControl, netbuf **nData, int mode, int dir, char *cmd)
{
int sData;
union {
struct sockaddr sa;
struct sockaddr_in in;
} sin;
struct linger lng = { 0, 0 };
unsigned int l;
int on=1;
netbuf *ctrl;
char *cp;
unsigned int v[6];
int ret;
if (nControl->dir != FTPLIB_CONTROL) return -1;
if ((dir != FTPLIB_READ) && (dir != FTPLIB_WRITE))
{
sprintf(nControl->response, “Invalid direction %d\n”, dir);
return -1;
}
if ((mode != ftplib::ascii) && (mode != ftplib::image))
{
sprintf(nControl->response, “Invalid mode %c\n”, mode);
return -1;
}
l = sizeof(sin);
memset(&sin, 0, l);
sin.in.sin_family = AF_INET;
if (!FtpSendCmd(“PASV”,‘2’,nControl)) return -1;
cp = strchr(nControl->response,‘(‘);
if (cp == NULL) return -1;
cp++;
sscanf(cp,“%u,%u,%u,%u,%u,%u”,&v[2],&v[3],&v[4],&v[5],&v[0],&v[1]);
if (nControl->correctpasv) if (!CorrectPasvResponse(v)) return -1;
sin.sa.sa_data[2] = v[2];
sin.sa.sa_data[3] = v[3];
sin.sa.sa_data[4] = v[4];
sin.sa.sa_data[5] = v[5];
sin.sa.sa_data[0] = v[0];
sin.sa.sa_data[1] = v[1];
if (mp_netbuf->offset != 0)
{
char buf[256];
sprintf(buf,“REST %ld”,mp_netbuf->offset);
if (!FtpSendCmd(buf,‘3’,nControl)) return 0;
}
sData = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
if (sData == -1)
{
perror(“socket”);
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_REUSEADDR, SETSOCKOPT_OPTVAL_TYPE &on,sizeof(on)) == -1)
{
perror(“setsockopt”);
net_close(sData);
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_LINGER, SETSOCKOPT_OPTVAL_TYPE &lng,sizeof(lng)) == -1)
{
perror(“setsockopt”);
net_close(sData);
return -1;
}
if (nControl->dir != FTPLIB_CONTROL) return -1;
sprintf(cmd,“%s\r\n”,cmd);
if (nControl->tlsctrl) ret = SSL_write(nControl->ssl,cmd,strlen(cmd));
else ret = net_write(nControl->handle,cmd,strlen(cmd));
if (ret <= 0)
{
perror(“write”);
return -1;
}
if (connect(sData, &sin.sa, sizeof(sin.sa)) == -1)
{
perror(“connect”);
net_close(sData);
return -1;
}
if (!readresp(‘1’, nControl))
{
net_close(sData);
return -1;
}
ctrl = static_cast<netbuf*>(calloc(1,sizeof(netbuf)));
if (ctrl == NULL)
{
perror(“calloc”);
net_close(sData);
return -1;
}
if ((mode == ‘A’) && ((ctrl->buf = static_cast<char*>(malloc(FTPLIB_BUFSIZ))) == NULL))
{
perror(“calloc”);
net_close(sData);
free(ctrl);
return -1;
}
ctrl->handle = sData;
ctrl->dir = dir;
ctrl->ctrl = (nControl->cmode == ftplib::pasv) ? nControl : NULL;
ctrl->idletime = nControl->idletime;
ctrl->cbarg = nControl->cbarg;
ctrl->xfered = 0;
ctrl->xfered1 = 0;
ctrl->cbbytes = nControl->cbbytes;
if (ctrl->idletime.tv_sec || ctrl->idletime.tv_usec) ctrl->idlecb = nControl->idlecb;
else ctrl->idlecb = NULL;
if (ctrl->cbbytes ) ctrl->xfercb = nControl->xfercb;
else ctrl->xfercb = NULL;
*nData = ctrl;
return 1;
}
/*
* FtpClose – close a data connection
*/
int ftplib::FtpClose(netbuf *nData)
{
netbuf *ctrl;
if (nData->dir == FTPLIB_WRITE)
{
if (nData->buf != NULL) writeline(NULL, 0, nData);
}
else if (nData->dir != FTPLIB_READ) return 0;
if (nData->buf) free(nData->buf);
shutdown(nData->handle,2);
net_close(nData->handle);
ctrl = nData->ctrl;
SSL_free(nData->ssl);
free(nData);
if (ctrl) return readresp(‘2’, ctrl);
return 1;
}
/*
* FtpRead – read from a data connection
*/
int ftplib::FtpRead(void *buf, int max, netbuf *nData)
{
int i;
if (nData->dir != FTPLIB_READ)
return 0;
if (nData->buf) i = readline(static_cast<char*>(buf), max, nData);
else
{
i = socket_wait(nData);
if (i != 1) return 0;
if (nData->tlsdata) i = SSL_read(nData->ssl, buf, max);
else i = net_read(nData->handle,buf,max);
}
if (i == -1) return 0;
nData->xfered += i;
if (nData->xfercb && nData->cbbytes)
{
nData->xfered1 += i;
if (nData->xfered1 > nData->cbbytes)
{
if (nData->xfercb(nData->xfered, nData->cbarg) == 0) return 0;
nData->xfered1 = 0;
}
}
return i;
}
/*
* FtpWrite – write to a data connection
*/
int ftplib::FtpWrite(void *buf, int len, netbuf *nData)
{
int i;
if (nData->dir != FTPLIB_WRITE) return 0;
if (nData->buf) i = writeline(static_cast<char*>(buf), len, nData);
else
{
socket_wait(nData);
if (nData->tlsdata) i = SSL_write(nData->ssl, buf, len);
else i = net_write(nData->handle, buf, len);
}
if (i == -1) return 0;
nData->xfered += i;
if (nData->xfercb && nData->cbbytes)
{
nData->xfered1 += i;
if (nData->xfered1 > nData->cbbytes)
{
if (nData->xfercb(nData->xfered, nData->cbarg) == 0) return 0;
nData->xfered1 = 0;
}
}
return i;
}
/*
* FtpSite – send a SITE command
*
* return 1 if command successful, 0 otherwise
*/
int ftplib::Site(const char *cmd)
{
char buf[256];
if ((strlen(cmd) + 7) > sizeof(buf)) return 0;
sprintf(buf,“SITE %s”,cmd);
if (!FtpSendCmd(buf,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpRaw – send a raw string string
*
* return 1 if command successful, 0 otherwise
*/
int ftplib::Raw(const char *cmd)
{
char buf[256];
strncpy(buf, cmd, 256);
if (!FtpSendCmd(buf,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpSysType – send a SYST command
*
* Fills in the user buffer with the remote system type. If more
* information from the response is required, the user can parse
* it out of the response buffer returned by FtpLastResponse().
*
* return 1 if command successful, 0 otherwise
*/
int ftplib::SysType(char *buf, int max)
{
int l = max;
char *b = buf;
char *s;
if (!FtpSendCmd(“SYST”,‘2’,mp_netbuf)) return 0;
s = &mp_netbuf->response[4];
while ((–l) && (*s != ‘ ‘)) *b++ = *s++;
*b++ = ‘\0’;
return 1;
}
/*
* FtpMkdir – create a directory at server
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Mkdir(const char *path)
{
char buf[256];
if ((strlen(path) + 6) > sizeof(buf)) return 0;
sprintf(buf,“MKD %s”,path);
if (!FtpSendCmd(buf,‘2’, mp_netbuf)) return 0;
return 1;
}
/*
* FtpChdir – change path at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Chdir(const char *path)
{
char buf[256];
if ((strlen(path) + 6) > sizeof(buf)) return 0;
sprintf(buf,“CWD %s”,path);
if (!FtpSendCmd(buf,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpCDUp – move to parent directory at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Cdup()
{
if (!FtpSendCmd(“CDUP”,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpRmdir – remove directory at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Rmdir(const char *path)
{
char buf[256];
if ((strlen(path) + 6) > sizeof(buf)) return 0;
sprintf(buf,“RMD %s”,path);
if (!FtpSendCmd(buf,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpPwd – get working directory at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Pwd(char *path, int max)
{
int l = max;
char *b = path;
char *s;
if (!FtpSendCmd(“PWD”,‘2’,mp_netbuf)) return 0;
s = strchr(mp_netbuf->response, ‘”‘);
if (s == NULL) return 0;
s++;
while ((–l) && (*s) && (*s != ‘”‘)) *b++ = *s++;
*b++ = ‘\0’;
return 1;
}
/*
* FtpXfer – issue a command and transfer data
*
* return 1 if successful, 0 otherwise
*/
int ftplib::FtpXfer(const char *localfile, const char *path, netbuf *nControl, int typ, int mode)
{
int l,c;
char *dbuf;
FILE *local = NULL;
netbuf *nData;
int rv=1; // 3.1-1
if (localfile != NULL)
{
//local = fopen(localfile, (typ == FTPLIB_FILE_WRITE) ? “r” : “w”);
char ac[3] = ” “;
if ((typ == FTPLIB_DIR) || (typ == FTPLIB_DIR_VERBOSE)) { ac[0] = ‘w’; ac[1] = ‘\0’; }
if (typ == FTPLIB_FILE_READ) { ac[0] = ‘w’; ac[1] = ‘\0’; }
if (typ == FTPLIB_FILE_WRITE_APPEND) { ac[0] = ‘r’; ac[1] = ‘\0’; }
if (typ == FTPLIB_FILE_READ_APPEND) { ac[0] = ‘a’; ac[1] = ‘\0’; }
if (typ == FTPLIB_FILE_WRITE) { ac[0] = ‘r’; ac[1] = ‘\0’; }
if (mode == ftplib::image) ac[1] = ‘b’;
local = fopen(localfile, ac);
if (typ == FTPLIB_FILE_WRITE_APPEND) fseeko(local,mp_netbuf->offset,SEEK_SET);
if (local == NULL)
{
strncpy(nControl->response, strerror(errno), sizeof(nControl->response));
return 0;
}
}
if (local == NULL) local = ((typ == FTPLIB_FILE_WRITE)
|| (typ == FTPLIB_FILE_WRITE_APPEND)) ? stdin : stdout;
if (!FtpAccess(path, typ, mode, nControl, &nData)) return 0;
dbuf = static_cast<char*>(malloc(FTPLIB_BUFSIZ));
if ((typ == FTPLIB_FILE_WRITE) || (typ == FTPLIB_FILE_WRITE_APPEND))
{
while ((l = fread(dbuf, 1, FTPLIB_BUFSIZ, local)) > 0)
{
if ((c = FtpWrite(dbuf, l, nData)) < l)
{
printf(“short write: passed %d, wrote %d\n”, l, c);
rv = 0;
break;
}
}
}
else
{
while ((l = FtpRead(dbuf, FTPLIB_BUFSIZ, nData)) > 0)
{
if (fwrite(dbuf, 1, l, local) <= 0)
{
perror(“localfile write”);
break;
}
}
}
free(dbuf);
fflush(local);
if (localfile != NULL)
fclose(local);
return FtpClose(nData);
return rv;
}
/*
* FtpNlst – issue an NLST command and write response to output
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Nlst(const char *outputfile, const char *path)
{
mp_netbuf->offset = 0;
return FtpXfer(outputfile, path, mp_netbuf, FTPLIB_DIR, ftplib::ascii);
}
/*
* FtpDir – issue a LIST command and write response to output
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Dir(const char *outputfile, const char *path)
{
mp_netbuf->offset = 0;
return FtpXfer(outputfile, path, mp_netbuf, FTPLIB_DIR_VERBOSE, ftplib::ascii);
}
/*
* FtpSize – determine the size of a remote file
*
* return 1 if successful, 0 otherwise
*/
//int ftplib::Size(const char *path, int *size, char mode)
int ftplib::Size(const char *path, int *size, ftplib::ftp mode)
{
char cmd[256];
int resp,sz,rv=1;
if ((strlen(path) + 7) > sizeof(cmd)) return 0;
sprintf(cmd, “TYPE %c”, mode);
if (!FtpSendCmd(cmd, ‘2’, mp_netbuf)) return 0;
sprintf(cmd,“SIZE %s”,path);
if (!FtpSendCmd(cmd,‘2’,mp_netbuf)) rv = 0;
else
{
if (sscanf(mp_netbuf->response, “%d %d”, &resp, &sz) == 2) *size = sz;
else rv = 0;
}
return rv;
}
/*
* FtpModDate – determine the modification date of a remote file
*
* return 1 if successful, 0 otherwise
*/
int ftplib::ModDate(const char *path, char *dt, int max)
{
char buf[256];
int rv = 1;
if ((strlen(path) + 7) > sizeof(buf)) return 0;
sprintf(buf,“MDTM %s”,path);
if (!FtpSendCmd(buf,‘2’,mp_netbuf)) rv = 0;
else strncpy(dt, &mp_netbuf->response[4], max);
return rv;
}
/*
* FtpGet – issue a GET command and write received data to output
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Get(const char *outputfile, const char *path, ftplib::ftp mode, off_t offset)
{
mp_netbuf->offset = offset;
if (offset == 0) return FtpXfer(outputfile, path, mp_netbuf, FTPLIB_FILE_READ, mode);
else return FtpXfer(outputfile, path, mp_netbuf, FTPLIB_FILE_READ_APPEND, mode);
}
/*
* FtpPut – issue a PUT command and send data from input
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Put(const char *inputfile, const char *path, ftplib::ftp mode, off_t offset)
{
mp_netbuf->offset = offset;
if (offset == 0) return FtpXfer(inputfile, path, mp_netbuf, FTPLIB_FILE_WRITE, mode);
else return FtpXfer(inputfile, path, mp_netbuf, FTPLIB_FILE_WRITE_APPEND, mode);
}
/*
* FtpRename – rename a file at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Rename(const char *src, const char *dst)
{
char cmd[256];
if (((strlen(src) + 7) > sizeof(cmd)) || ((strlen(dst) + 7) > sizeof(cmd))) return 0;
sprintf(cmd,“RNFR %s”,src);
if (!FtpSendCmd(cmd,‘3’,mp_netbuf)) return 0;
sprintf(cmd,“RNTO %s”,dst);
if (!FtpSendCmd(cmd,‘2’,mp_netbuf)) return 0;
return 1;
}
/*
* FtpDelete – delete a file at remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Delete(const char *fnm)
{
char cmd[256];
if ((strlen(fnm) + 7) > sizeof(cmd)) return 0;
sprintf(cmd,“DELE %s”,fnm);
if (!FtpSendCmd(cmd,‘2’, mp_netbuf)) return 0;
return 1;
}
/*
* FtpQuit – disconnect from remote
*
* return 1 if successful, 0 otherwise
*/
int ftplib::Quit()
{
if (mp_netbuf->dir != FTPLIB_CONTROL) return 0;
if (mp_netbuf->handle == 0)
{
strcpy(mp_netbuf->response, “error: no anwser from server\n”);
return 0;
}
if (!FtpSendCmd(“QUIT”,‘2’,mp_netbuf))
{
net_close(mp_netbuf->handle);
return 0;
}
else
{
net_close(mp_netbuf->handle);
return 1;
}
}
int ftplib::Fxp(ftplib* src, ftplib* dst, const char *pathSrc, const char *pathDst, ftplib::ftp mode, ftplib::ftp method)
{
char *cp;
unsigned int v[6];
char buf[256];
int retval = 0;
sprintf(buf, “TYPE %c”, mode);
if (!dst->FtpSendCmd(buf,‘2’,dst->mp_netbuf)) return -1;
if (!src->FtpSendCmd(buf,‘2’,src->mp_netbuf)) return -1;
if (method == ftplib::defaultfxp)
{
// PASV dst
if (!dst->FtpSendCmd(“PASV”,‘2’,dst->mp_netbuf)) return -1;
cp = strchr(dst->mp_netbuf->response,‘(‘);
if (cp == NULL) return -1;
cp++;
sscanf(cp,“%u,%u,%u,%u,%u,%u”,&v[2],&v[3],&v[4],&v[5],&v[0],&v[1]);
if (dst->mp_netbuf->correctpasv) if (!dst->CorrectPasvResponse(v)) return -1;
// PORT src
sprintf(buf, “PORT %d,%d,%d,%d,%d,%d”, v[2],v[3],v[4],v[5],v[0],v[1]);
if (!src->FtpSendCmd(buf,‘2’,src->mp_netbuf)) return -1;
// RETR src
strcpy(buf,“RETR”);
if (pathSrc != NULL)
{
int i = strlen(buf);
buf[i++] = ‘ ‘;
if ((strlen(pathSrc) + i) >= sizeof(buf)) return 0;
strcpy(&buf[i],pathSrc);
}
if (!src->FtpSendCmd(buf, ‘1’, src->mp_netbuf)) return 0;
// STOR dst
strcpy(buf,“STOR”);
if (pathDst != NULL)
{
int i = strlen(buf);
buf[i++] = ‘ ‘;
if ((strlen(pathDst) + i) >= sizeof(buf)) return 0;
strcpy(&buf[i],pathDst);
}
if (!dst->FtpSendCmd(buf, ‘1’, dst->mp_netbuf))
{
/* this closes the data connection, to abort the RETR on
the source ftp. all hail pftp, it took me several
hours and i was absolutely clueless, playing around with
ABOR and whatever, when i desperately checked the pftp
source which gave me this final hint. thanks dude(s). */
dst->FtpSendCmd(“PASV”, ‘2’, dst->mp_netbuf);
src->readresp(‘4’, src->mp_netbuf);
return 0;
}
retval = (src->readresp(‘2’, src->mp_netbuf)) & (dst->readresp(‘2’, dst->mp_netbuf));
}
else
{
// PASV src
if (!src->FtpSendCmd(“PASV”,‘2’,src->mp_netbuf)) return -1;
cp = strchr(src->mp_netbuf->response,‘(‘);
if (cp == NULL) return -1;
cp++;
sscanf(cp,“%u,%u,%u,%u,%u,%u”,&v[2],&v[3],&v[4],&v[5],&v[0],&v[1]);
if (src->mp_netbuf->correctpasv) if (!src->CorrectPasvResponse(v)) return -1;
// PORT dst
sprintf(buf, “PORT %d,%d,%d,%d,%d,%d”, v[2],v[3],v[4],v[5],v[0],v[1]);
if (!dst->FtpSendCmd(buf,‘2’,dst->mp_netbuf)) return -1;
// STOR dest
strcpy(buf,“STOR”);
if (pathDst != NULL)
{
int i = strlen(buf);
buf[i++] = ‘ ‘;
if ((strlen(pathDst) + i) >= sizeof(buf)) return 0;
strcpy(&buf[i],pathDst);
}
if (!dst->FtpSendCmd(buf, ‘1’, dst->mp_netbuf)) return 0;
// RETR src
strcpy(buf,“RETR”);
if (pathSrc != NULL)
{
int i = strlen(buf);
buf[i++] = ‘ ‘;
if ((strlen(pathSrc) + i) >= sizeof(buf)) return 0;
strcpy(&buf[i],pathSrc);
}
if (!src->FtpSendCmd(buf, ‘1’, src->mp_netbuf))
{
src->FtpSendCmd(“PASV”, ‘2’, src->mp_netbuf);
dst->readresp(‘4’, dst->mp_netbuf);
return 0;
}
// wait til its finished!
retval = (src->readresp(‘2’, src->mp_netbuf)) & (dst->readresp(‘2’, dst->mp_netbuf));
}
return retval;
}
int ftplib::SetDataEncryption(ftplib::ftp flag)
{
if (!mp_netbuf->tlsctrl) return 0;
if (!FtpSendCmd(“PBSZ 0”,‘2’,mp_netbuf)) return 0;
switch(flag)
{
case 0:
mp_netbuf->tlsdata = 0;
if (!FtpSendCmd(“PROT C”,‘2’,mp_netbuf)) return 0;
break;
case 1:
mp_netbuf->tlsdata = 1;
if (!FtpSendCmd(“PROT P”,‘2’,mp_netbuf)) return 0;
break;
default:
return 0;
}
return 1;
}
int ftplib::NegotiateEncryption()
{
int ret;
if (!FtpSendCmd(“AUTH TLS”,‘2’,mp_netbuf)) return 0;
mp_netbuf->sbio = BIO_new_socket(mp_netbuf->handle, BIO_NOCLOSE);
SSL_set_bio(mp_netbuf->ssl,mp_netbuf->sbio,mp_netbuf->sbio);
ret = SSL_connect(mp_netbuf->ssl);
if (ret == 1) mp_netbuf->tlsctrl = 1;
if (ret < 1) return 0;
return 1;
}
void ftplib::SetCallbackIdleFunction(FtpCallbackIdle pointer)
{
mp_netbuf->idlecb = pointer;
}
void ftplib::SetCallbackXferFunction(FtpCallbackXfer pointer)
{
mp_netbuf->xfercb = pointer;
}
void ftplib::SetCallbackLogFunction(FtpCallbackLog pointer)
{
mp_netbuf->logcb = pointer;
}
void ftplib::SetCallbackArg(void *arg)
{
mp_netbuf->cbarg = arg;
}
void ftplib::SetCallbackBytes(off_t bytes)
{
mp_netbuf->cbbytes = bytes;
}
void ftplib::SetCallbackIdletime(int time)
{
mp_netbuf->idletime.tv_sec = time / 1000;
mp_netbuf->idletime.tv_usec = (time % 1000) * 1000;
}
void ftplib::SetConnmode(ftplib::ftp mode)
{
if ((mode != ftplib::pasv) && (mode != ftplib::port)) mode = ftplib::defaultconnmode;
mp_netbuf->cmode = mode;
}
void ftplib::ClearNetbuf()
{
mp_netbuf->dir = FTPLIB_CONTROL;
mp_netbuf->ctrl = NULL;
mp_netbuf->cmode = ftplib::defaultconnmode;
mp_netbuf->idlecb = NULL;
mp_netbuf->idletime.tv_sec = mp_netbuf->idletime.tv_usec = 0;
mp_netbuf->cbarg = NULL;
mp_netbuf->xfered = 0;
mp_netbuf->xfered1 = 0;
mp_netbuf->cbbytes = 0;
mp_netbuf->tlsctrl = 0;
mp_netbuf->tlsdata = 0;
mp_netbuf->offset = 0;
mp_netbuf->handle = 0;
mp_netbuf->logcb = NULL;
mp_netbuf->xfercb = NULL;
mp_netbuf->correctpasv = true;
}
int ftplib::CorrectPasvResponse(unsigned int *v)
{
struct sockaddr ipholder;
unsigned int ipholder_size = sizeof(ipholder);
if (getpeername(mp_netbuf->handle, &ipholder, &ipholder_size) == -1)
{
perror(“getpeername”);
net_close(mp_netbuf->handle);
return 0;
}
for (int i = 2; i < 6; i++) v[i] = ipholder.sa_data[i];
return 1;
}

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